Desk lamp



FIG. 1 is a perspective view of a desk lamp, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof.

The broken line portion of the figure drawings is included to show portions of the article that forms no part of the claimed design. 

CLAIM I claim the ornamental design for a desk lamp, as shown and described. 